2123243211 has 4 divisors (see below), whose sum is σ = 2830990952. Its totient is φ = 1415495472.

The previous prime is 2123243201. The next prime is 2123243231. The reversal of 2123243211 is 1123423212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2123243211 - 2¹⁸ = 2122981067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123243201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353873866 + ... + 353873871.

It is an arithmetic number, because the mean of its divisors is an integer number (707747738).

Almost surely, 2^2123243211 is an apocalyptic number.

2123243211 is a deficient number, since it is larger than the sum of its proper divisors (707747741).

2123243211 is an equidigital number, since it uses as much as digits as its factorization.

2123243211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707747740.

The product of its digits is 576, while the sum is 21.

The square root of 2123243211 is about 46078.6632944143. The cubic root of 2123243211 is about 1285.2864075164.

Adding to 2123243211 its reverse (1123423212), we get a palindrome (3246666423).

It can be divided in two parts, 212 and 3243211, that added together give a palindrome (3243423).

The spelling of 2123243211 in words is "two billion, one hundred twenty-three million, two hundred forty-three thousand, two hundred eleven".